Pneumatic tire



.(No Model.) PNEUMATIG Tum No. ffam,A Y Patented Jail. 26,-1892.

gi 'L lha/en Q02, E @7a/m Zzmgn ntrnrrr JOHN F. PALMER, FCHI'OAGG, ILLlNOiS.

PNMM'WC TIRE,

erncrrron u feminin@ port of Lettere Potent No. 4??,649, dated Jennery 26, low.,

implication filed ."Dcoeinber l, 1891. Serial No. ilSSl. (lio model.)

To all whom it may concorre:

pnenmotic tiresl for bicycles7 rbc., and relatiesv more particularly to o method of providing the oir-tube of the pneuinetic tire with o protective covering for the purpose ci closing any holes that moy occur in the tube ond to otrengtben the tube when in use. Heretofore the usuel practice has been to provide on the pneumotic tube e ceee orcovering oi convene and sometimes of leyere of `cenvne end vu'l-v cenieed rizsbber., it bee been tbe practice, eo

for-as l ein errore, niet to iorm the' rubber tube reody for application ne e tire end for tillin g with eir,ond then when thus produced to npply directly to the come tbe ceeing or covering deemed desirable for its protection ogeinet'expeneion end for strengthening it.

The object of my invention is to improve the present structure of tires end the method of producing the seme in the perticulors bereinefter exploinied.

My invention relates, also, to on improved construction 'of the tire under which tbe meteriol involved in the casing, which ie inmine-a dietely in conteo-t vvith the pneumatic tube, shell be mede of row rubber or of vulcanized' rubber having e. facing of raw rubber or oth: errvisc provided with e suitable cement, Whereby any apertures in the tire which would permit thc escape of oir shell be closed by the pressure of the resilient soft rubber.

My invention consiste, further, in e method of applying to o pneumatic tire e rubber or similar protective covering extending entirely or part way around the sume iu croco` section, 'which consiste in molding the covering motel-iol upon fabric, suoli as comvos, in sucb e manner es to extend in on opposite direction both iu cross-section cnil longitudinelly to tbe intended direction of the covering when applied to the tubiug,n1id thereupon and citer tiene producing the covering to turn the come longitwdiuolly end trene- .versely to present es the inner fece what in 4the course of production lied been the outer foce, thereby cnueing e compression of the resilient materiel, increesing its effectiveness, all in the manner hereinafter more fully expleined.

My invention consiste, furti1er, in om im proved niethod'of oeclirici,r the comvos covering upon o. pneumatic tube, particularly if the some shell be provided with the interinodiete soft-rubber covering above described.

My invention consiste, furtbenin en improved method of occuring the outer covering upon the tire bev-ing en intermediate convois covering end ci securing; the tire so produced to tbe Wheel.

-My invention consiste, further, iu certziin details of improvements und combinotionsoi porte, eil ne 4bereiimiter more fully pointed out.

in the drawings, Figure l represente e rubber tire ond illustrates the method of ite production. Fig. 2 represente e treneverse eec tion of e pneumetic-tube tire constructed in accordance with. my invention. Fig. 3 repreecute tbe method which l prefer to employ for constructing the tire end applying e protectivecoetiug; end Fig. i is e vier:r in cross-section of c, rubber tire provided with my iniprovement and involving come additional feotures not chown in Fig. 2.

A represents the pneumatic tube formed in the usuel niemeer-1e to present ou annuler tire to be filled with oir.

B represents a coating or covering of ooit or raw rubber extending port wey around the tire or tube A ond incloeing the treed portion of tbe tube.

C is'e, covering oi eenvee or eimilolr fnbric inclosing the soft-rubber covering; B end tube A, the lateral ende oi .vbicli convee covering ere brought together end eo served ce to leave t-lic Flaps C.

D rcpreeents the outer, preferably vuiceu ized rubber, covering to incluse tlie tube, con

structed ce described, seid outer covering D lbeiug provided with longitudinal groo'veo l near the converging edges to receive thelongitudinal beads s, formed on the outer edges of the iiaps C ot the canvas covering C.

E represents a protective loop or doubled strip of canvas introduced under the meeting parts-of the canvas covering C, said loop or strip having the longitudinal projecting flaps E', intended to extend between the adjacent parts of the canvas C, so that when the latter are sewed together the stitches will also pass through said flaps, leaving the loop portion E under the stitching to serve as a guard to protect the inner air-tube from tlie-ehaiing actionl of thc stitched edges.

In practice l prefer to employ in conne@ tion with the foregoing construction a softrubber protective covering F on the inner side of the tube, which may be applied in any convenient manner before applying and securing the canvas C and outer tube l).

My improved method ot' applying the cov-A ering of soft rubber is illustrated in Figs. l and 3, and is as follows: A former or mandrel G is employed, upon which the canvas C is stretched, so as to present substantially the configuration of the 'linished rubber tire. Upon the canvas thus secured the covering of sot't rubber is applied, being caused to adlrere to the same in any substantial manner. It, instead of raw rubber, vulcanized rubber be used, I prefer to apply thereto, after it has been securcdto the canvas, facing of raw rubber or other suitable material. 'When thus formed, the canvas is removed from the former G and turned inside out, so that whereas the covering l when applied on the mandrel .vason the outside ot" the canvas it is nonT upon the inside, and the meeting ends of the canvas tubing are turned backward and caused tomeet in au opposite circle, so that the inner edges will become the inner edges and the outer edges y will become the outer edges g/"onnthc opposite end of a common diamet-rical line. ily thus turning the canvas tubing to the opposite curvature longitudinallyand transversely, it is quite apparent that the rubber which is changed fronrthe external to the internal part of the tubing is compressed because the canvas or other fabric or backing is incapable of being stretched.

l'n practice I usually prefer to apply the rubber to theenuvas in a transverse measurenient, so as to extend only to the points r, thus covering what will constitute the tread portion when the covering is applied totlie tire. The @aura-s is made much wider than the circumferential measurement'. ot the tube A, viewed in cross-section,and thus presents the tiaps C, before referred to, when the meeting parts of the canvas are stitched together, asindicated at p. Between-thc ineetingparts of the canvas and theinterior rubber tube A the loop or protector E is introdutced and the seneca stitching passes through lAfter the external rubber coating has been applied the tube thus constructed may at once be introduced upon the felly ll of the wheel, the pressure scrviugto hold the flaps C( against the tubing, the beads s entering the recess z. serving firmly to hold the parts together. When, as in. accordance with my preferred construction, a soft-rubber protective coating is introduced upon the inner or hub side of thev tube, it may be done as clearly illustrated in Fig. 4, in which case the canvas C incloses they covering Fand holds it in position.

.Vhat I claim as new, and desire to' secure by Letters Patent, is-

l. A pneumatic tire for bicycles,comprising an air-tu`oe having applied to its outer surface a, partial tube of soft rubber Wit-h an inelastic backing, whereby any apertures 0ccurring inthe inner tube may be sealed, substantially as described.

2. The method of coating of rubber or like material to the airtube ot' a pneumatic tire, which consists in applying the rubber or similar material to. a backing having a curvature opposite to that ofthe tube and thereupon reversing theeurvature of the backing and applying it to the pneumatic tube to cause the rubber or similar material to lie between the tube and backing, substantially as described.

3. The method of applying rubber er like material tothe air-tube of a pneumatic tire, which consists in applying the rubber or similar niaterialto a exiblebacking and thereupon applying the backing to the tube and curving the backing with the rubber or similar material on the interior, se as to present the curvature ot' the pneumatic tube, whereby the rubber or similar material shall be connpressed by reason of its mode of application to the air-tube, substantially as described.,

et. The method ot applying a protective coating of rubber or air-tube of a pneumatic tire, which consists in curving a tiexible backing, such as canvas, so as to present in transverse section a curvature opposite tc that of the air-tube, then applying to the outer .tace of the backing in part of its width the layer or coatiugof rubber or similar' material, and then reversing the tiaps E thereof.

applying a protective y similar material to the IYO the curvature of the backing and the protective material carried thereby'and applying the saine to the rubber tube in such manner that the protective material shall be between the backing and tube, substantially as described.

5. In a pneumatic tire for bicycles, the combination, with the air-tube, of a protective layer l5 of; sott rubber or the like, an.inclosing casing ot canvas or the like, having,when secured, the flaps C beaded at the lateral extremities, as shown, and the outer covering l), having the longitudinal grooves s to reueve the beaded edges of the flaps; substantially as described.

6. A pneumatic tige comprising, in combination, air-mbe A; protective leyex' ou the tread portion, protective layer F en the inner side of the tube-inclosng casing C, end.. felly ll", substantially es described.

''. ln e pneumatietube for bicycles, the

combination, with the air-tube A, of en nto closing casing of exble mettermi C enel o, loop or strip E between the sttohed edges of the easing and .thetube, substentlelly es @tml for the purpose set forth.

JOHN l?. Pllllllt. In presence 0- J. N. lIANsoN, M. J. FROST. 

